I've changed the intake gaskets new wires and plugs ,cap and rotor , seliniod, cleaned the injectors and timed it but it still lacks power especially up hills it chugs and hesitates but it don't die I need help on what to do next

 

I would use a vacuum gauge, still the best tool around for gasoline engines, and only $20, way better than a code reader, lol.

Engine is a self powered air pump, and best way to check any pump is with a pressure gauge

How to use it here: Technical Articles: Engine testing with a Vacuum Gauge - at Greg's Engine & Machine

expect 17-21" of vacuum at idle, if its lower then there's the lack of power, need to find out why its low

Do the blocked exhaust test, limited exhaust flow robs power, if the old air(exhaust) can't get out, then the new air(with gasoline) can't come in


Make sure the SPOUT connector got put back in after you timed the distributor, SPOUT is the Vacuum Advance on computer controlled ignitions, engine would be very sluggish without "vacuum advance"